/*
 * 微信公众平台(JAVA) SDK
 *
 * Copyright (c) 2014, Ansitech Network Technology Co.,Ltd All rights reserved.
 *
 * http://www.weixin4j.org/sdk/
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 */
package com.mc.adapter.wechat.mpAPI.message.output;

import java.util.ArrayList;
import java.util.List;

import com.mc.adapter.wechat.mpAPI.message.Articles;
import com.mc.adapter.wechat.mpAPI.message.OutputMessage;

/**
 * 这个类实现了<tt>OutputMessage</tt>，用来回复图文消息
 *
 * <p>
 * 提供了获取多条图文消息信息<code>getArticles()</code>等主要方法.
 * </p>
 *
 * @author weixin4j<weixin4j@ansitech.com>
 */
public class NewsOutputMessage extends OutputMessage {

	/** TODO add comments */
	private static final long	serialVersionUID	= 1L;
	/**
	 * 消息类型:图文消息
	 */
	private final String		MsgType				= "news";
	/**
	 * 图文消息个数，限制为10条以内
	 */
	private Integer				ArticleCount;
	/**
	 * 多条图文消息信息，默认第一个item为大图,注意，如果图文数超过10，则将会无响应
	 */
	private List<Articles>		Articles;

	/**
	 * 获取 消息类型
	 *
	 * @return 消息类型
	 */
	@Override
	public String getMsgType() {
		return this.MsgType;
	}

	/**
	 * 获取 图文消息个数
	 *
	 * @return 图文消息个数
	 */
	public Integer getArticleCount() {
		return this.ArticleCount;
	}

	/**
	 * 获取 多条图文消息信息
	 *
	 * @return 多条图文消息信息，默认第一个item为大图,注意，如果图文数超过10，则只读取前10个
	 */
	public List<Articles> getArticles() {
		return this.Articles;
	}

	/**
	 * 设置 多条图文消息信息
	 *
	 * @param articles
	 *            多条图文消息信息，默认第一个item为大图,注意，如果图文数超过10，则只读取前10个
	 */
	public void setArticles(List<Articles> articles) {
		if (articles != null) {
			if (articles.size() > 10) {
				articles = new ArrayList<Articles>(articles.subList(0, 10));
			}
			this.ArticleCount = articles.size();
		}
		this.Articles = articles;
	}

	@Override
	public String toXML() {
		StringBuilder sb = new StringBuilder();
		sb.append("<xml>");
		sb.append("<ToUserName><![CDATA[").append(this.getToUserName()).append("]]></ToUserName>");
		sb.append("<FromUserName><![CDATA[").append(this.getFromUserName()).append("]]></FromUserName>");
		sb.append("<CreateTime>").append(this.getCreateTime()).append("</CreateTime>");
		sb.append("<MsgType><![CDATA[" + this.MsgType + "]]></MsgType>");
		sb.append("<ArticleCount>").append(this.ArticleCount).append("</ArticleCount>");
		sb.append("<Articles>");
		for (Articles article : this.Articles) {
			sb.append("<item>");
			sb.append("<Title><![CDATA[").append(article.getTitle()).append("]]></Title>");
			sb.append("<Description><![CDATA[").append(article.getDescription()).append("]]></Description>");
			sb.append("<PicUrl><![CDATA[").append(article.getPicUrl()).append("]]></PicUrl>");
			sb.append("<Url><![CDATA[").append(article.getUrl()).append("]]></Url>");
			sb.append("</item>");
		}
		sb.append("</Articles>");
		sb.append("</xml>");
		return sb.toString();
	}
}
